Diff Drain Bolt

T

TheHoff

Member
 Wickham, Hampshire
I've had a look on RealOEM, but cannot find the part number for the diff drain bolt, which includes the seal.

Any ideas chaps and chappesses? Mine is weeping a touch and I'd like to replace the oil when refurbishing the back end.
 
E bay - as below Z4 not listed but on other sites the same fits all models. Advantage to this one over BMW is that it has improved seal quality and a magnetic pick up.

http://www.ebay.co.uk/itm/Magnetic-Genuine-BMW-Diff-drain-plug-E30-E36-E46-M3-Z3M-M5-Z3-3-series-5-318i-/141473885231?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item20f0802c2f
 
Remember that you need something like an oil siringe to get the oil in, like this:
31.jpg

You probably cant get the normal squirtbottle in there (maybe with a hose).
Also check if you have a diff with 2 bolts (drain&fill) or a diff with only fill bolt.
The bolts are 14mm hex I think, not something which is present in every toolkit.

Or are you removing the complete diff/rear axle?
 
And here:

http://realoem.com/bmw/showparts.do?model=BT33&mospid=47798&btnr=33_1147&hg=33&fg=10&hl=11

.....and as listed is the same fitment for virtually every BMW produced :thumbsup:
 
Thanks for the replies guys.

To clarify, is item 3 a fill bolt of some description, and item 4 the drain bolt? I'm used to diffs with two hex bolts that look the same.

I ordered a 14mm hex socket last weekend, so all squared away on that front, but thank you for the heads up.

I am removing EVERYTHING on the rear axle! I'll be undersealing the chassis too. Whilst some may say this is unnecessary, and modern cars don't rust, well they do - I've seen it, and this is a great opportunity to do it properly.

I'll change the diff oil with it removed, negating the need to purchase a pump - is the gearbox similarly tricky to fill?
 
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